Našao rešenje na FF forumu:
Citat:
Well, the easiest way to restore a deleted speed dial thumb is to have a back-up of your chromeappsstore.sqlite file, because the blacklist data is definitely stored there. Then, you can simply overwrite the original file with the back-up.
The location is:
%APPDATA%\Mozilla\Firefox\Profiles\
Šta reći, backup je kevara. :D